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A matrix based method for determining depth from focus
Ens, J. Lawrence, P.
Sch. of Comput. Sci., Simon Fraser Univ., Burnaby, BC;

This paper appears in: Computer Vision and Pattern Recognition, 1991. Proceedings CVPR '91., IEEE Computer Society Conference on
Publication Date: 3-6 Jun 1991
On page(s): 600-606
Meeting Date: 06/03/1991 - 06/06/1991
Location: Maui, HI, USA
ISBN: 0-8186-2148-6
References Cited: 14
INSPEC Accession Number: 4127756
Digital Object Identifier: 10.1109/CVPR.1991.139760
Current Version Published: 2002-08-06

Abstract
The authors reveal some fundamental problems with inverse filtering: inaccuracies in finding the frequency-domain representation, windowing effects, and border effects. A general, matrix-based method using regularization that eliminates these problems is presented. The method is confirmed experimentally, with the results showing an RMS (root mean square) error of 1.3%

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